Vanos controls the difference between intake and exhaust camshafts. The exhaust camshafts are locked in phase with the crank shaft but the intake camshafts will vary to change how long they are open and when they open. On the N62 in addition there is an additional set of hardware that amazingly also changes how FAR they open!

The solinoids control the vanos and if it's sticky it will most certainly affect throttle performance at any position. It's about 30 hours less work to change the solinoids vs refresh the vanos seals so very good news for you.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)